Separating machine



(No Model.)

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SBPARATING MACHINE.

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N. W. HOLT. SEPARATING MACHINE.

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. SEPARATING MACHINE.

No. 513,613. v l Patented Jan. '30, 1894.

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sEPARAT'lNc-MACHINE.

SPECIFICATIWON forming part of Letters `Patent No. 513,613, dated January 30, 1894.

Application filed April 23, 1891. ySerial No. 390,139. (No model.)

To ctZZwzom t may concern.' l

ne it Yknown that I, Noxa w.y Hom, a ein.

zen of the United States, yresiding at Man.

chester,in the county of Washtenaw and State of Michigan, have invented new and useful Improvements in ASeparating Machinesf" of which the following is a specification.

This invention relates to improvements in separating machines of the general construction which is described and shown in Letters Patent of the United States, No. 417,676, granted to me December 17, 1889.`

The object of my present invention is to simplify the construction of the machine and to reduce the possibility of dust leaking from the machine.

In the accompanying drawings consisting of four sheets:-Figure 1 is a sectional elevation of a single separating machine provided with my improvements. Fig. 2 is a horizontal section in line Fig. 1. Fig. 3 is a vertical section in line fy-fy, Fig. 1. Fig. el. is a horizontal section in line w-oa Fig. 3. Fig. 5 is a sectional elevation of a duplex separating machine provided with my improvements. Fig. 6 is a side elevation of the upper portion of the machine at right angles to Fig. 5. Fig. 7 is a vertical section in line -w, Fig. 5. Fig. 8 is a horizontal section in line Fig. 7.

Like letters of reference refer to like parts in the several figures.

A represents the aspirating `or exhaust chamber which forms the top portion of the machine.

B represents the fan oase secured to the rear side of the exhaust chamber and communicating therewith by an eye a which is guarded within the exhaust chamber by an inclined board b carrying at its upper end an adjustable valve h by which the force of the air current can be regulated.

c represents the fan shaft arrangedhorizontally in the exhaust chamber and fan case and carrying within the latter the blades (l.

D represents the driving pulley secured to the front end of the fan shaft and e is an eccentric secured to the front portion of the fan shaft behind the driving pulley and provided with a rodE which extends downwardly from the eccentric to the oscillating feeder F. The latter extends across the lower front portion of the exhaust chamber and is pivoted to the side walls of the exhaust chamber at f, so as the front wall of the exhaust chamber .and

reaching nearly to the curved bottom or outer wall fof the oscillating feeder, so as to prevent the ingress of air into the exhaust chamber through the feeder, while permitting a thin stream of material to pass from the feeder into the exhaust chamber. The feeder is sector-shaped and is tted with the upper portion of its curved bottom or outer wall against the lower front portion of the feed hopper G and is arranged with the lower portion of its curved outer wall in line with the lower edge of the exhaust chamber.

H represents a centrifugal dust collector which is arranged below the exhaust chamber.

h is the top plate of the dust collector to which the rear and side walls of the exhaust chamber are secured and which is provided with a rectangular opening corresponding in size and form to the space between the walls of the exhaust chamber and by which the air passes from the dust collector into the exhaust chamber.

h is the downwardly tapering peripheral wall of the dust collector provided at its small lower end with a discharge spout c' through which the separated dust is delivered to any suitable receptacle. J represents the blast spout of the fan which opens tangentially into the upper or large portion of the dust collector so as to deliver the blast into the same in a direction by which the air and dust are caused to rotate in the dust collector.

K represents inclined shelves or cant boards secured in the upper portion of the dust collector underneath the exhaust chamber and extending from the front wall of the exhaust chamber and the lower end of the feeder downwardly and backwardly. TheseV `cant boards are separated by air passages 7c in such manner that the lower edge of each cant KGO board overlaps the upper edge of the next lower board. These cant boards form the front wall of a hopper L which has vertical side walls Z and an inclined rear wall Z secured to the top plate h of the dust collector. This hopper is divided into a front and rear portion by an adjustable valve M arranged transverselyin the hopper and pivoted at its lower end.

m is an inclined deflecting board secured to the inner side of the rear wall of the exhaust chamber and having its lower end arranged in rear of the upper portion of the valve M, so that the passage or space between the valve and the deliecting board can be increased or reduced by adjusting the valve.

N is a receiving hopper arranged underneath the front portion of the hopper L and receiving the coarse material which tails olf from the cant boards. This hopper is provided with a discharge spout 'n which extends through the wall of the dust collector. O is a similar hopper arranged in rear of the hopper Nand provided with a discharge spout o. This hopper receives the material which descends in the eddy space behind the valve M.

Prepresents a valve which is arranged near the front wall of the exhaust chamber and extends across the same above the feeder so as to break the air current which liows from the cant boards upwardly along the front wall of the exhaust chamber to the fan, thereby preventing the air current from carrying heavy material to the fan. This valve is pivoted at its upper end and projects downwardly and rearwardly from the front wall toward the upper end of the lower valve M. By adjusting these valves toward or from each other, the width of the air passage between their free ends, through which the air current Hows to the fan, is reduced or increased. The upper or front valve P also forms an eddy in the exhaust chamber which promotes the separation of any heavy material which has been lifted by the air current.

Q represents a shield or curved guard plate arranged in the upper portion of the dust collector in front of the cant boards and secured with its upper edge to the top plate of the dust collector and extending downwardly and backwardly to a point somewhat lower than the lowest air space between the cant boards in order to compel the rotating body of air to descend below these cant boards before it can reachthe air passages between the cant boards, thereby effecting a complete separation of the dust from the air before the latter is again brought in contact with fresh material to be separated.

The middlings or other material to be separated pass from the feed hopper upon the oscillating feeder and from the latter upon the upper cant board from which they pass successively over the lower cant boards. In passing from one cant board to another they drop through the air current which is drawn by the fan through the airspace between every two cant boards and this air current removes the light material from the middlings and carries it up into the exhaust chamber. The heavy middlings which have been freed from the fluff and other light impurities bythe air current tail oif into the receiving hopperN and escape through the spout n. The heavier grade of light material which has been lifted by the air current into the exhaust chamber drops out of the air current in the eddy on the rear side of the lower' valve M and passes into the receiving hopper O from which it is discharged by the spout 0'., This separation of the heavier grade of light material can be regulated by shifting the valve or cut-off. M s o that a greater or less amount of material 1s separated from the air currentin the exhaust chamber. lightest grade of material remains suspended, passes over the top edge of the valve bv and into Vthe fan case and is blown bythe fan into the dust collector in which the air and dust assume a whirling motion. This causes the The air current, in which the' dust to be massed against the tapering pev ripheral wall of Vthe dust collector and to be finally discharged through the spout t, while the air which has been freed from the dust passes around the lower edge of the'shieldQ and upwardly to and through the air spaces between the cant boards where it again comes in contact with the material flowing over the cant boards and the separating action is repeated.

The rear wall and the side walls of the exhaust chamber are tightly secured to the top plate of the dust collector, so that all parts of the dust collector which are subjected to an internal air pressure are tightly closed, whereby the blowing out of dust is avoided. Open joints are formed only at the upper and lower edges of the curved wallof the oscillating feeder. The range of movement of this feeder is very short, usually about an eighth of an inch, which permits a very snug fit of lthe IOO roi;

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feeder to the stationary parts of the machine. Y

These joints are located in the exhaust chamber which has a tendency to draw in air, so that no tendency exists to blow dust out through these joints. The feeder is very light and the power required for operating it is inconsiderable.

In Figs. 5 to 8, a duplex separating machine is represented whereby the capacity of the machine is doubled when the same kind of material is separated in both parts of the machine, or whereby two different grades of material can be operated upon at the same time.

The exhaust chamber is divided into two parts by a central partition R, which extends into the upper portion of the dust collector, and the fan case S, which is arranged in the exhaust chamber above and within the partition, and is provided with two eyes s s which communicate with the two vparts of the exhaust chamber. Each of the parts of the exhaust chamber is provided with a feeder, cant boards, cut-off valves and receiving hoppers of the construction and arrangement already described with reference to the single machine. A single dust collector Hincloses both sets of cant boards and connect- 5 ing parts and collects the dust drawn by the fan from both parts of the machine. tubular guard T is secured to the under side of the top plate of the dust collector and surrounds both sets of cant boards. Each half [o lof the machine operates in connection with the fan and dust collector like the single machine already described.

I caim as my inventionv 1. The combination with the exhaust chamr 5 ber, of stationary inclined shelves or cant boards separated by air passages and arranged below the exhaust chamber, a movable feeder arranged above the shelves or cant boards, a dust collecting chamber arranged zo below the cant boards, and tightly connected at its top to the lower end of the exhaust chamber, except at the feed opening, and a fan having its eye connected with the exhaust chamber and its blast spout with the dust colz 5 lecting chamber, substantially as set forth.

2. The combination with the exhaust chamber, of a dust collecting chamber tightly connected at its top to the lower end of the exhaust chamber, except at the feed opening, 3o stationary inclined shelves or cant boards arranged below the exhaust chamberand extending from the top of the dust collecting chamber downwardly, a shield depending into the dust collecting chamber in front of said 3 5 shelves or cant boards, a movable feeder arranged above the shelves or cant boards, and a fan having its eye conected with the exhaust chamber and its blast spout with the dust collecting chamber, substantially as set forth.

3. The combination with the exhaust chamber, the feeder arranged in the same, the dust collector arranged below the exhaust chamber, the lcant boards, and the fan having its eye connected with the exhaust chamber and its blast spout with the dust collector, of a valve arranged in rear of the cant boards, and a valve arranged above the feeder, beth valves being adjustable with their free ends toward and from each other, substantially as set forth.

4. The combination with the dust collecting chamber and the exhaust chamber surmounting the same, of a fan and case arranged within the exhaust chamber, having eyes on opposite sides communicating with the parts of the exhaust chamber and having its blast spout connected with the dust collecting chamber, a partition arranged below the fan case and extending into the dust collecting chamber, and feeders, stationary cant boards and receiving hoppers arranged on opposite sides of said partition, substantially as set forth.

Witness my hand this 6th day of April, 1891.

NOAH W. HOLT. Witnesses:

C. R. KNICKERBOCKER, JNO. G. MUNDY. 

